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WO2014113997A1 - Procédé de mise en œuvre de compensation gamma sur un dispositif d'affichage et de compensation gamma - Google Patents

Procédé de mise en œuvre de compensation gamma sur un dispositif d'affichage et de compensation gamma Download PDF

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Publication number
WO2014113997A1
WO2014113997A1 PCT/CN2013/071039 CN2013071039W WO2014113997A1 WO 2014113997 A1 WO2014113997 A1 WO 2014113997A1 CN 2013071039 W CN2013071039 W CN 2013071039W WO 2014113997 A1 WO2014113997 A1 WO 2014113997A1
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WO
WIPO (PCT)
Prior art keywords
display
environment
brightness
value
gamma
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/071039
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English (en)
Chinese (zh)
Inventor
陈黎暄
康志聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/818,812 priority Critical patent/US20140292792A1/en
Publication of WO2014113997A1 publication Critical patent/WO2014113997A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for performing gamma compensation on a display and a gamma compensation device.
  • Gamma is a parameter of the display that is derived from the response curve of the display, which characterizes the non-linear relationship between the display brightness of the display and the input voltage.
  • the same image may vary on different displays, depending on the size of the Gamma.
  • the International Commission on Lighting International Commission on Illumination, CIE
  • CIE International Commission on Illumination
  • the gamma value of the display is fixed at 2.2, which does not satisfy the display effect in a bright environment, and it is easy to reduce the layering perceived by the human eye and Comfort.
  • the technical problem to be solved by the present invention is to provide a method for performing Gamma compensation on a display and a Gamma compensation device, which can improve the display accuracy of the display in the presence of ambient light, thereby improving the layering and comfort of the human eye.
  • a technical solution adopted by the present invention is to provide a method for performing gamma compensation on a display, comprising: dividing a display brightness of the display into M levels, and acquiring a display setting in each brightness level in the first environment.
  • the brightness value at the time of display and the brightness value of the ambient light reflected on the surface of the display screen in the second environment are fitted to obtain a gamma synthesis value closest to 2.2; the brightness at the time of display display is adjusted according to the gamma synthesis value.
  • the step of obtaining a Gamma synthesized value includes: according to each brightness in the first environment The brightness value of the level display, the brightness curve of the display in the first environment is drawn; according to the brightness curve of the display in the first environment and the ambient light brightness value reflected on the surface of the display screen in the second environment, a Gamma synthesis is obtained by least squares fitting value.
  • the step of adjusting the brightness when the display is displayed according to the gamma compositing value includes: in the second environment, replacing the gamma value currently used by the display with the gamma compositing value to adjust the brightness when the display is displayed.
  • another technical solution adopted by the present invention is to provide a method for performing gamma compensation on a display, comprising: separately obtaining brightness values when the display is displayed in the first environment, and displaying screens in the second environment.
  • the brightness value of the ambient light reflected by the surface, the first environment is that the display is in an environment where no ambient light is reflected; the brightness value when the display is displayed according to the first environment, and the brightness value of the ambient light reflected by the screen surface of the display in the second environment , fitting a Gamma synthesis value; adjusting the brightness of the display according to the gamma synthesis value.
  • the step of obtaining a Gamma synthesized value according to the brightness value when the display is displayed in the first environment and the brightness value of the ambient light reflected by the display screen surface in the second environment comprises: displaying according to the display in the first environment The brightness value of the time, the brightness value of the ambient light reflected by the surface of the display screen in the second environment, is fitted to obtain a gamma synthesis value closest to 2.2.
  • the step of separately obtaining the brightness value of the display when the display is displayed in the first environment and the brightness value of the ambient light reflected by the surface of the display screen in the second environment comprises: dividing the display brightness of the display into M levels, and acquiring the first environment The lower display sets the brightness value at each brightness level, where M is an integer greater than one.
  • the step of obtaining a Gamma synthesized value includes: according to each brightness in the first environment The brightness value of the level display, the brightness curve of the display in the first environment is drawn; according to the brightness curve of the display in the first environment and the ambient light brightness value reflected on the surface of the display screen in the second environment, a Gamma synthesis is obtained by least squares fitting value.
  • the step of adjusting the brightness when the display is displayed according to the gamma compositing value includes: in the second environment, replacing the gamma value currently used by the display with the gamma compositing value to adjust the brightness when the display is displayed.
  • a gamma compensation device which includes: an acquisition module, configured to respectively acquire brightness values when the display is displayed in the first environment, and in the second environment The brightness value of the ambient light reflected by the surface of the display screen.
  • the first environment is that the display is in an environment where no ambient light is reflected;
  • the fitting module is configured to display the brightness value according to the display in the first environment, and the display screen in the second environment.
  • the brightness value of the ambient light reflected by the surface is fitted to obtain a Gamma composite value; and an adjustment module for adjusting the brightness of the display according to the gamma composite value.
  • the fitting module is specifically configured to obtain a gamma synthesis value closest to 2.2 according to the brightness value when the display is displayed in the first environment and the brightness value of the ambient light reflected by the display screen surface in the second environment.
  • the obtaining module is specifically configured to divide the display brightness of the display into M levels, and obtain a brightness value when the display is set at each brightness level in the first environment, where M is an integer greater than 1.
  • the fitting module includes: a drawing unit, configured to draw a brightness curve of the display in the first environment according to the brightness value of each brightness level display in the first environment; a least squares fitting unit, configured to be used according to the first environment The brightness curve of the display and the ambient light brightness value reflected by the surface of the display screen in the second environment are fitted by a least squares method to obtain a gamma composite value.
  • the adjustment module is specifically configured to replace the gamma value currently used by the display with the gamma composite value in the second environment to adjust the brightness when the display is displayed.
  • the invention has the beneficial effects that the present invention obtains the brightness value of the display when the display is displayed in the first environment and the brightness value of the ambient light reflected by the surface of the display screen in the second environment, wherein the first The environment is that the display is in an environment that is not affected by ambient light, and the second environment is that the display is in an environment affected by ambient light, thereby obtaining that when the display is in the second environment, the brightness perceived by the human eye when the display is displayed is The sum of the brightnesses is obtained by fitting the two brightnesses to obtain a gamma synthesis value, and adjusting the brightness of the display according to the gamma synthesis value, the gamma synthesis value is based on the perception of the human eye, and the gamma synthesis value is Adjusting the brightness of the display can improve the display accuracy of the display in the presence of ambient light, thereby improving the layering and comfort perceived by the human eye.
  • FIG. 1 is a flow chart of an embodiment of a method for performing gamma compensation on a display according to the present invention
  • FIG. 2 is a flow chart of another embodiment of a method for performing gamma compensation on a display according to the present invention
  • Figure 3 is The brightness curve corresponding to the brightness perceived by the human eye when the display in the second environment is displayed in the second environment, and the brightness curve when the display is displayed after adjusting the gamma synthesis value;
  • FIG. 4 is a schematic structural view of an embodiment of a gamma compensation device of the present invention.
  • Fig. 5 is a schematic view showing the structure of another embodiment of the gamma compensation device of the present invention.
  • an embodiment of a method for performing gamma compensation on a display according to the present invention includes:
  • Step S101 respectively obtaining a brightness value when the display is displayed in the first environment and a brightness value of the ambient light reflected by the surface of the display screen in the second environment, where the first environment is that the display is in an environment where no ambient light is reflected;
  • the reflected light between an object such as a wall or a desk, etc.
  • the light emitted by a light source such as a light, etc.
  • the sum of the lights is called ambient light.
  • the first environment is that the display is in an environment that does not generate ambient light reflection, such as a dark environment
  • the second environment is that the display is in an environment capable of generating ambient light reflection, such as a bright environment
  • the display In a dark environment, obtain the brightness value of the display when the display is in the environment, and obtain the brightness value of the ambient light reflected by the surface of the display screen in the environment in a bright environment, and the human eye perceives when the display is in the second environment.
  • the brightness when the display is displayed is the sum of the two brightnesses;
  • the brightness value of the ambient light reflected by the surface of the display screen in the second environment may be obtained by using a test method, for example, a method for measuring the reflective intensity of the display surface based on the visual basis, or an auxiliary device such as an ambient light sensor is used to acquire the display screen.
  • a test method for example, a method for measuring the reflective intensity of the display surface based on the visual basis, or an auxiliary device such as an ambient light sensor is used to acquire the display screen.
  • the measuring method of the reflective intensity of the display surface is specifically:
  • the first screen and the second screen are placed side by side, and the first screen is provided with a light shielding member. Observing the display brightness of the two screens directly in front of the two screens, when the display brightness of the two screens is observed to be the same, the brightness value of the first screen and the brightness value of the second screen are obtained by the instrument measurement, and then the brightness of the first screen can be obtained. The difference between the value and the brightness value of the second screen is calculated to obtain the reflected intensity of the screen surface in the environment.
  • the first screen is provided with a light-shielding member, which can effectively block the ambient light, reduce or avoid the influence on the measurement, and thereby obtain the first screen display brightness without the influence of ambient light or close to the influence of no ambient light.
  • Step S102 fitting, according to the brightness value when the display is displayed in the first environment, and the brightness value of the ambient light reflected by the surface of the display screen in the second environment, to obtain a Gamma synthesized value;
  • the Gamma of the display is generally between 1.9 and 2.5.
  • the larger the value of Gamma the larger the display contrast of the display and the greater the brightness value.
  • the smaller the value of Gamma the smaller the display contrast of the display.
  • the brightness value also becomes smaller;
  • a Gamma synthesized value is obtained by fitting according to the brightness value when the display is displayed in the first environment and the brightness value of the ambient light reflected by the display screen surface in the second environment.
  • Step S103 adjusting brightness when the display is displayed according to the gamma synthesis value
  • the brightness of the display is adjusted according to the gamma composite value, so that when the surface of the display screen reflects the ambient light, the human eye is more comfortable in viewing the display.
  • the present invention acquires the brightness value of the display when the display is displayed in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment, wherein the first environment is that the display is not In the environment affected by ambient light, the second environment is that the display is in an environment affected by ambient light, and thus it can be concluded that when the display is in the second environment, the brightness perceived by the human eye when the display is displayed is the sum of the two brightnesses.
  • the gamma synthesis value is based on the perception of the human eye, and the brightness of the display is adjusted by the gamma synthesis value. It can improve the display accuracy of the display in the presence of ambient light, thereby improving the layering and comfort perceived by the human eye.
  • another embodiment of the method for performing gamma compensation on a display of the present invention includes:
  • Step S201 respectively acquiring the brightness value when the display is displayed in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment;
  • the first environment is that the display is in an environment where no ambient light is reflected, such as a dark environment
  • the second environment is that the display is in an environment capable of generating ambient light reflection, such as a bright environment
  • the display brightness of the display In a dark environment, the brightness value of the display when the display is displayed in the environment is obtained, and in a bright environment, the brightness value of the ambient light reflected by the surface of the display screen in the environment is obtained.
  • the display brightness of the display can be divided into M. Level, M is an integer greater than 1, where the first level is the darkest and the M level is the brightest.
  • the display brightness level of the display is divided into 256 levels, and the brightness value when the display is set at each brightness level in the first environment is obtained.
  • Step S202 fitting, according to the brightness value when the display is displayed in the first environment, and the brightness value of the ambient light reflected by the display screen surface in the second environment, to obtain a Gamma synthesized value;
  • a Gamma synthesized value is obtained by fitting, wherein the gamma synthesis value obtained by fitting is closest to 2.2.
  • Step S202 includes the following sub-steps, and the specific content is as follows:
  • Sub-step S2021 drawing a brightness curve of the display in the first environment according to the brightness value of each brightness level display in the first environment;
  • each brightness level of the display and obtaining the brightness of the display under each brightness level, in particular, by using the brightness measuring instrument to closely contact the screen of the display to measure the display when the display is displayed brightness.
  • the brightness curve of the display in the first environment is plotted with the divided brightness level as the abscissa and the brightness value as the ordinate.
  • Sub-step S2022 obtaining a Gamma synthesized value by least squares fitting according to a brightness curve of the display in the first environment and an ambient light brightness value reflected on the surface of the display screen in the second environment;
  • the least squares method also known as the least squares method, finds the best function match for the data by minimizing the sum of the squares of the errors.
  • a Gamma synthesized value is obtained by least squares fitting according to the brightness curve of the display in the first environment and the ambient light brightness value reflected by the surface of the display screen in the second environment.
  • Step S203 adjusting brightness when the display is displayed according to the gamma synthesis value
  • Adjusting the brightness of the display when the display is displayed according to the obtained gamma synthesis value Specifically, in the second environment, the gamma value currently used by the display is replaced with the gamma synthesized value obtained above to display the display. The brightness is adjusted to improve the layering and comfort of the human eye.
  • FIG. 3 is a schematic diagram of a brightness curve corresponding to the brightness perceived by the human eye when the display is displayed in the second environment according to the present invention, and a brightness curve when the display is displayed after adjusting the gamma compositing value, as shown in FIG.
  • the display brightness level of the display is divided into 256 levels according to the gray scale of the display, the abscissa is gray scale, and the ordinate is brightness (unit is nit).
  • the curve L1 is a brightness curve corresponding to the brightness perceived by the human eye when the display is displayed in the second environment
  • the curve L2 is a brightness curve when the display is displayed after adjusting using the gamma composite value.
  • the gray level when the gray level is 0, refer to the curve L2, and the brightness value of the display when the display is adjusted using the gamma compositing value is 0; referring to the curve L1, the human eye perception is displayed when the display is in the second environment.
  • the brightness value is not zero, as a result of ambient light reflected from the surface of the display screen. It can be seen that, according to the brightness value when the display is displayed in the first environment and the brightness value of the ambient light reflected by the surface of the display screen in the second environment, a Gamma synthesized value is obtained by least squares fitting, and the gamma synthesized value is used for the display.
  • the difference between the brightness curve corresponding to the brightness curve displayed by the display and the brightness perceived by the human eye when the display is displayed in the second environment is minimized, and finally the effect of improving the sense of layering and comfort of the human eye is achieved. .
  • the gamma synthesis value obtained after fitting is 2.334, and the gamma synthesis value is closest to 2.2.
  • an embodiment of the gamma compensation device of the present invention includes an acquisition module 401, a fitting module 402, and an adjustment module 403, wherein:
  • the obtaining module 401 is configured to respectively obtain a brightness value when the display is displayed in the first environment and a brightness value of the ambient light reflected by the screen surface of the display in the second environment, where the first environment is that the display is in an environment that does not generate ambient light reflection;
  • the first environment is that the display is in an environment where no ambient light is reflected, such as a dark environment
  • the second environment is that the display is in an environment capable of generating ambient light reflection, such as a bright environment
  • the obtaining module 401 is specifically configured to obtain a brightness value when the display is displayed in the environment in a dark environment, and obtain a brightness value of the ambient light reflected by the surface of the display screen in the environment in a bright environment, and the display is in a bright environment. At the time, the brightness perceived by the human eye when the display is displayed is the sum of the two brightnesses.
  • the fitting module 402 is configured to fit a Gamma synthesized value according to a brightness value when the display is displayed in the first environment and a brightness value of the ambient light reflected by the display screen surface in the second environment;
  • the fitting module 402 of the present embodiment is specifically configured to obtain a Gamma synthesized value by fitting according to the brightness value when the display is displayed in the first environment and the brightness value of the ambient light reflected by the screen surface of the display in the second environment.
  • the adjustment module 403 is configured to adjust brightness when displaying the display according to the gamma composite value
  • the adjustment module 403 is specifically configured to adjust the brightness of the display according to the obtained gamma composite value, so that when the surface of the display screen reflects ambient light, the perceived brightness of the human eye is more comfortable when viewing the display.
  • an embodiment of the gamma compensation device of the present invention includes an acquisition module 501, a fitting module 502, and an adjustment module 503, wherein:
  • the obtaining module 501 is configured to respectively acquire a brightness value when the display is displayed in the first environment and a brightness value of the ambient light reflected by the screen surface of the display in the second environment;
  • the obtaining module 501 is specifically configured to divide the display brightness of the display into M levels, and M is an integer greater than 1, wherein the first level is the darkest and the M level is the brightest. For example, according to the gray scale of the display, the display brightness level of the display is divided into 256 levels, and the brightness value when the display is set at each brightness level in the first environment is obtained.
  • the fitting module 502 is configured to fit a Gamma synthesized value according to a brightness value when the display is displayed in the first environment and a brightness value of the ambient light reflected by the display screen surface in the second environment;
  • the fitting module 502 is specifically configured to obtain a Gamma synthesized value by fitting according to a brightness value when the display is displayed in the first environment and a brightness value of the ambient light reflected by the display screen surface in the second environment, wherein the fitting result is obtained by fitting
  • the gamma synthesis value is closest to 2.2.
  • the fitting module 502 includes a rendering unit 5021 and a least squares fitting unit 5022.
  • the drawing unit 5021 is configured to draw a brightness curve of the display in the first environment according to the brightness value of each brightness level display in the first environment;
  • the drawing unit 5021 is specifically configured to adjust, under the first environment, each brightness level of the display, obtain the brightness of the display under each brightness level, and draw a brightness curve of the display in the first environment.
  • the least squares fitting unit 5022 is configured to obtain a Gamma synthesized value by least squares fitting according to the brightness curve of the display in the first environment and the ambient light brightness value reflected by the display screen surface in the second environment;
  • the least squares fitting unit 5022 is specifically configured to use a least squares fitting method according to a brightness curve of the display in the first environment and an ambient light brightness value reflected on the surface of the display screen in the second environment when the display is in the second environment. A Gamma synthesis value is obtained.
  • the adjusting module 503 is configured to adjust brightness when displaying the display according to the gamma composite value
  • the adjusting module 503 is specifically configured to: in the second environment, replace the gamma value currently used by the display with the gamma compositing value obtained above, to adjust the brightness when the display is displayed, to improve the sense of layering and comfort of the human eye. Effect.
  • the present invention has the advantages of: obtaining a brightness value when the display is displayed in the first environment, and a brightness value of the ambient light reflected by the screen surface of the display in the second environment, wherein the first environment is that the display is at In an environment that is not affected by ambient light, the second environment is that the display is in an environment affected by ambient light, and thus it can be concluded that when the display is in the second environment, the brightness perceived by the human eye when the display is displayed is the sum of the two brightnesses.
  • the gamma synthesis value is based on the perception of the human eye,
  • the gamma synthesis value adjusts the brightness of the display to improve the layering and comfort perceived by the human eye.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

La présente invention concerne un procédé de mise en œuvre de compensation gamma sur un dispositif d'affichage et de compensation gamma. Le procédé de compensation comprend les étapes consistant à : obtenir une valeur de luminosité d'un dispositif d'affichage lors du travail dans un premier environnement et une valeur de luminosité de lumière ambiante qui est réfléchie par une surface d'écran du dispositif d'affichage dans un second environnement, respectivement (S101) ; obtenir, par adaptation, une valeur gamma synthétisée d'après la valeur de luminosité du dispositif d'affichage lors du travail dans le premier environnement et la valeur de luminosité de la lumière ambiante qui est réfléchie par la surface d'écran du dispositif d'affichage dans le second environnement (S102) ; et régler la luminosité du dispositif d'affichage lors du travail d'après la valeur gamma synthétisée (S103). Au moyen de ce procédé, il est possible d'améliorer la précision d'affichage d'un dispositif d'affichage en présence de lumière ambiante ; ainsi, on peut améliorer le ressenti du niveau de profondeur et de confort en termes de perception visuelle humaine.
PCT/CN2013/071039 2013-01-23 2013-01-28 Procédé de mise en œuvre de compensation gamma sur un dispositif d'affichage et de compensation gamma Ceased WO2014113997A1 (fr)

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CN201310025188.0 2013-01-23
CN201310025188.0A CN103065609B (zh) 2013-01-23 2013-01-23 一种对显示器进行Gamma补偿的方法及Gamma补偿装置

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